Dear all,
Is Pipe diameter is essential variable for the Welding Procedure qualification as per API 1104 ?
The following clause of API 1104 Welding procedure qualification says that Diameter and thickness shall be identified as per 6.2.2 but under the title '5.4 ESSENTIAL VARIABLES', diameter is not mentioned.
Clause no. 5.3.2.3 Diameter and wall thickness
Does the above clause mean that Diameter grouping is to be considered while qualifying procedure?
Please advise.
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